Pcb multi-lakabyada soo saarayaasha guddiga wareegga waxay leeyihiin cilmi-baaris farsamo xirfadeed iyo kooxda horumarinta, sayid tignoolajiyada horumarsan ee warshadaha ee, oo ay leeyihiin tas-hiilaad wax soo saarka la isku halayn karo, goobaha baaritaanka iyo shaybaar jirka iyo kiimikaad leh dhammaan noocyada kala duwan ee hawlaha.FR-4-ka aan halkan kaga hadlayno waa nooca xaashida ee inta badan loo isticmaalo soo saarista looxyada wareegyada badan ee pcb.
Aad u maqaar-saar ah, laminate iyo prepreg-ga ugu isticmaalka badan adduunka waa NEMA oo lagu magacaabo FR4
Qiyaastii 14% wadarta wax-soo-saarka waa hal-dhinac ama laba-geesood oo FR-4 ah, iyo inta soo hartay ee ku saabsan 40% ee guddiga lakabyada badan waa khafiif FR -4 laminates.Dhamaadka taariikhiga ah ee xukunka FR-4 ee suuqa waxaa inta badan sabab u ah xaqiiqda ah in ay aad uga badan tahay warqadaha ku saleysan waraaqaha ee guryaha kulaylka, hagaajinta qoyaanka iyo caabbinta kiimikada, xoogga dabacsanaanta sare iyo xoogga diirka wanaagsan..FR4 waa laminate-ka ugu horreeya ee loo isticmaali karo guga-ilaa-daloolka laba-geesoodka ah sababtoo ah caabbinta qoyaanka iyo kimikalka kiimikada.Waxaa dheer, qiimaha FR-4 ee lacagtu waa mid aan laga adkaan karin.Sanadihii la soo dhaafay, warshaduhu waxay u maleynayeen in FR-4 ay siin doonto dariiqa alaabta cusub ee laminate ee ku habboon cufnaanta fadhiga sare.Si kastaba ha ahaatee, sababtoo ah caqabadaha kharashka, naqshadeeyayaasha guddiga wareegyada ayaa wali raadinaya habab ay u isticmaalaan FR-4 shirarka cufnaanta sare leh.
Walaxda xoojinta ee loo isticmaalo laminates-ka FR4 waa muraayad elektaroonik ah Wib (E-glass).Sababtoo ah sifooyinka farsamada ee gaarka ah ee wanaagsan, guryaha korantada ee ku qanacsan, caabbinta kulaylka, caabbinta qoyaanka iyo caabbinta aashitada, E-nooca muraayadda muraayadda muraayadda ayaa noqotey qalab koronto oo aad u wanaagsan.Dhammaan dharka loo isticmaalo FR4 waxay leeyihiin qaab dhismeed siman oo siman iyadoo loo eegayo habka loo tolo dambiisha, dushana waxaa lagu dahaadhay lakabka rinjiga si loo xoojiyo isku-dhafka u dhexeeya fiilooyinka dhalada iyo resins dabiiciga ah.Inta lagu jiro habka tolida ee hoos u dhaca, dhumucda iyo tirada fiilooyinka dhalada ayaa la go'aamiyaa.Miisaanka aasaasiga ah iyo dhumucda dharka la dhammeeyey ayaa la go'aamiyaa, dhumucda muraayadda muraayadda ee loo isticmaalo looxa daabacan ayaa inta badan ka bilaabma 6 ilaa 172m, iyo prepreg ka kooban maro fiber galaas ah ayaa go'aaminaya dhumucda laminate.Guud ahaan, dhumucda lakabka FR4 waa bam ~ 1L57mm (kordheysa inta u dhaxaysa 25pm), dhumucda gaarka ah waxay kuxirantahay nooca maro fiber galaas ah iyo nuxurka resin dabiiciga ah ee xaashida kiimikada ee la isticmaalay.Waxqabadka laminate-ka waxaa ugu horreyntii go'aamiya qaab-dhismeedka, maaddaama iibsaduhu uu sameeyo dalabyo taxadar leh, iyo dhumucdiisuna, waxaa jira qaabab badan oo buuxin kara dulqaadka la bixiyay.Kala duwanaanshiyaha xuubka dabiiciga ah (mararka qaarkood waxaa loo tixraacaa saamiga alwaax ilaa maro fiberglass) waxay saameyn doontaa sifooyinka laminate.
Nidaamka guud ee xabagta dabiiciga ah ee epoxy wuxuu ka kooban yahay xeryahooda epoxy-ga firfircoon ee kala duwan, iyo xargaha dabiiciga ah ee epoxy-ga caadiga ah (mid kasta oo ka mid ah qaybaha ay ka kooban tahay) waxaa lagu helaa isku-dhafka hal koox epoxy iyo tetrabromofluorescein A (TBPA).Waxaa jira laba xeryood oo oksijiin epoxy falgal ah oo ku yaal silsiladda polymer), sida ku cad sawirka 4.6.Dhererka silsiladda u dhexeeya kooxaha ayaa go'aaminaya adkaanta laminateerka iyo sifooyinka kulaylka ee laminate.Inta lagu jiro habka daawaynta, kooxaha ogsijiinta epoxy waxay la falgalaan wakiilka daawaynta si ay u bilaabaan matrix polymer saddex-cabbir ah.Iyada oo qayb ka ah silsiladda polymer-ka, bromine Wakamura waxaa lagu daraa TBBPA, taas oo ka dhigaysa TBPA inay leedahay sifooyin dab-demis oo gaar ah.Sida laga soo xigtay Underwriters Laboratories
(Underwriters Laboratory) Imtixaanka UL94, si loo sameeyo laminate dhamaystiran oo leh heerka V0 ee dib u dhaca ololka, waxaa lagama maarmaan ah in lagu daro bromine inta u dhaxaysa 16% iyo 21% miisaan ahaan.
Alaabooyinka guddiga wareegga pcb ee soosaarayaasha guddiga wareegga badan ee pcb waxay daboolayaan looxyada lakabka 2-28, looxyada HDI, looxyo naxaas ah oo qaro weyn TG, looxyo adag oo jilicsan, looxyada soo noqnoqda sare, laminates warbaahinta isku dhafan, indho la'aan lagu aasay looxyada, substrates biraha iyo maya. saxan halogen.Faa'iidada wareegga baska Shenzhen wuxuu ku yaalaa noocyo kala duwan oo ka mid ah furayaasha dhexe-ilaa-sare, iyo qiimihiisu wali waa mid aad u jaban, oo waxay horeyba ugu jirtaa booska ugu horreeya ee warshadaha pcb.
Waqtiga boostada: Agoosto-08-2022